68442449423759 has 4 divisors (see below), whose sum is σ = 69463978519704. Its totient is φ = 67420920327816.

The previous prime is 68442449423753. The next prime is 68442449423779. The reversal of 68442449423759 is 95732494424486.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68442449423759 - 2⁸ = 68442449423503 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68442449423692 and 68442449423701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68442449423753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510764547872 + ... + 510764548005.

It is an arithmetic number, because the mean of its divisors is an integer number (17365994629926).

Almost surely, 2^{68442449423759} is an apocalyptic number.

68442449423759 is a deficient number, since it is larger than the sum of its proper divisors (1021529095945).

68442449423759 is a wasteful number, since it uses less digits than its factorization.

68442449423759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021529095944.

The product of its digits is 1672151040, while the sum is 71.

The spelling of 68442449423759 in words is "sixty-eight trillion, four hundred forty-two billion, four hundred forty-nine million, four hundred twenty-three thousand, seven hundred fifty-nine".